Advertisement

Journal of Materials Science

, Volume 42, Issue 11, pp 3901–3907 | Cite as

Antagonistic effect of superplasticizer and colloidal nano-silica in the hydration of Alite and Belite pastes

  • Joakim Björnström
  • Itai PanasEmail author
Article

Abstract

The dependence on the hydration rate for Alite and Belite clinker phases in the presence of a polycarboxylate superplasticizer PC SP upon addition of colloidal nano-silica CNS were monitored by means of Diffuse Reflectance Infrared spectroscopy DR-FTIR. Spectral signatures of clinker dissolution and product formation were acquired for both materials. The rates for the build-up of product vibrational band intensities were found to depend sensitively on addition of CNS. The hydration product was proposed to be calcium-silicate-hydrate C–S–H. Details in the spectral signatures were found to differ. Quantum chemical calculations were employed and found to be consistent with the interpretation that small clusters dominate the Alite C–S–H spectrum, whereas the Belite C–S–H spectrum results from extended polymers.

Keywords

Alite Hydration Process Lignosulfonate Belite Hydration Time 

Notes

Acknowledgements

Support from The Knowledge Foundation (KK-stiftelsen, Stockholm), Swedish Research Council, and EKA Chemicals, Bohus, Sweden are gratefully acknowledged. Dr Mats Halvarsson and Jonas Gustavsson are thanked for providing the SEM images.

References

  1. 1.
    Pirazzoli I, Alesiani M, Capuani S, Maraviglia B, Giorgi R, Ridi F, Baglioni P (2005) Magn Reson Imaging 23(2):277CrossRefGoogle Scholar
  2. 2.
    Nkinamubanzi PC, Aitcin PC (2004) Cem Concr Aggr 26(2):102Google Scholar
  3. 3.
    Björnström J, Chandra S (2003) Mater Struct 36(264):685CrossRefGoogle Scholar
  4. 4.
    Zhang YS, Sun W, Liu SF (2002) Cem Concr Res 32(9):1483CrossRefGoogle Scholar
  5. 5.
    Kreppelt F, Weibel M, Zampini D, Romer M (2002) Cem Concr Res 32(2):187CrossRefGoogle Scholar
  6. 6.
    Björnström J, Martinelli A, Johnson JRT, Matic A, Panas I (2003) Chem Phys Lett 380:165CrossRefGoogle Scholar
  7. 7.
    Björnström J, Martinelli A, Matic A, Börjesson L, Panas I (2004) Chem Phys Lett 392:242CrossRefGoogle Scholar
  8. 8.
    Delley B (1990) J Chem Phys 92:508CrossRefGoogle Scholar
  9. 9.
    Delley B (2000) J Chem Phys 113:7756CrossRefGoogle Scholar
  10. 10.
    Becke AD (1988) Phys Rev A 38:3098CrossRefGoogle Scholar
  11. 11.
    Lee CT, Yang WT, Parr RG (1988) Phys Rev B 37:785CrossRefGoogle Scholar
  12. 12.
    Richardson IG (2004) Cem Concr Res 34:1733CrossRefGoogle Scholar
  13. 13.
    Popescu CD, Muntean M, Sharp JH (2003) Cem Concr Comp 25(7):689CrossRefGoogle Scholar
  14. 14.
    Chen JJ, Thomas JJ, Taylor HFW, Jennings HM (2004) Cem Concr Res 34:1499CrossRefGoogle Scholar
  15. 15.
    Richardson IG (2000) Cem Concr Comp 22:97CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Department of ChemistryGöteborg UniversityGoteborgSweden
  2. 2.Department of Chemistry and BiotechnologyChalmers University of TechnologyGöteborgSweden

Personalised recommendations